Messages in this thread | | | From | Dipanjan Das <> | Date | Wed, 20 Jul 2022 19:24:45 -0700 | Subject | kernel BUG in ntfs_read_folio |
| |
Hi,
We would like to report the following bug which has been found by our modified version of syzkaller.
====================================================== description: kernel BUG in ntfs_read_folio affected file: fs/ntfs/aops.c kernel version: 5.19-rc6 kernel commit: 32346491ddf24599decca06190ebca03ff9de7f8 git tree: upstream kernel config: https://syzkaller.appspot.com/text?tag=KernelConfig&x=cd73026ceaed1402 crash reproducer: attached ====================================================== Crash log: ====================================================== kernel BUG at fs/ntfs/aops.c:186! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 6070 Comm: syz-executor.3 Tainted: G OE 5.19.0-rc6-g2eae0556bb9d #2 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014 RIP: 0010:ntfs_read_block fs/ntfs/aops.c:186 [inline] RIP: 0010:ntfs_read_folio+0x306a/0x4250 fs/ntfs/aops.c:436 Code: 00 48 8b 44 24 18 31 ff 48 8b 98 30 fd ff ff 48 c1 eb 03 83 e3 01 89 de e8 23 cd d8 fe 84 db 0f 85 60 e8 ff ff e8 f6 cb d8 fe <0f> 0b e8 ef cb d8 fe 48 c7 c6 a0 f5 00 8a 4c 89 ff e8 a0 87 0e ff RSP: 0018:ffffc9001de2f848 EFLAGS: 00010212 RAX: 0000000000005c9f RBX: 0000000000000000 RCX: 0000000000040000 RDX: ffffc90002a91000 RSI: ffff888038f40000 RDI: 0000000000000002 RBP: ffff8880195f4250 R08: ffffffff82a204ca R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: ffff8880195f4250 R13: ffffea0002024220 R14: fffff94000404841 R15: ffffea0002024200 FS: 00007f223e52d700(0000) GS:ffff888135c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe2f01b0000 CR3: 000000008d587000 CR4: 0000000000150ee0 Call Trace: <TASK> do_read_cache_folio+0x213/0x6c0 mm/filemap.c:3524 do_read_cache_page mm/filemap.c:3602 [inline] read_cache_page+0x62/0x2b0 mm/filemap.c:3611 read_mapping_page include/linux/pagemap.h:759 [inline] ntfs_map_page fs/ntfs/aops.h:75 [inline] map_mft_record_page fs/ntfs/mft.c:73 [inline] map_mft_record+0x1db/0x10c0 fs/ntfs/mft.c:156 ntfs_read_locked_inode+0x19c/0x5ab0 fs/ntfs/inode.c:550 ntfs_read_inode_mount+0xd72/0x2480 fs/ntfs/inode.c:2091 ntfs_fill_super+0x16ce/0x3520 fs/ntfs/super.c:2854 mount_bdev+0x34d/0x410 fs/super.c:1367 legacy_get_tree+0x105/0x220 fs/fs_context.c:610 vfs_get_tree+0x89/0x2f0 fs/super.c:1497 do_new_mount fs/namespace.c:3040 [inline] path_mount+0x1228/0x1cb0 fs/namespace.c:3370 do_mount+0xf3/0x110 fs/namespace.c:3383 __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount fs/namespace.c:3568 [inline] __x64_sys_mount+0x18f/0x230 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 RIP: 0033:0x7f223d48fe8e Code: 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f223e52c9f8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f223d48fe8e RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f223e52ca50 RBP: 00007f223e52ca90 R08: 00007f223e52ca90 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000000 R13: 0000000020000100 R14: 00007f223e52ca50 R15: 0000000020086400 </TASK> Modules linked in: uio_ivshmem(OE) uio(E) ---[ end trace 0000000000000000 ]--- RIP: 0010:ntfs_read_block fs/ntfs/aops.c:186 [inline] RIP: 0010:ntfs_read_folio+0x306a/0x4250 fs/ntfs/aops.c:436 Code: 00 48 8b 44 24 18 31 ff 48 8b 98 30 fd ff ff 48 c1 eb 03 83 e3 01 89 de e8 23 cd d8 fe 84 db 0f 85 60 e8 ff ff e8 f6 cb d8 fe <0f> 0b e8 ef cb d8 fe 48 c7 c6 a0 f5 00 8a 4c 89 ff e8 a0 87 0e ff RSP: 0018:ffffc9001de2f848 EFLAGS: 00010212 RAX: 0000000000005c9f RBX: 0000000000000000 RCX: 0000000000040000 RDX: ffffc90002a91000 RSI: ffff888038f40000 RDI: 0000000000000002 RBP: ffff8880195f4250 R08: ffffffff82a204ca R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: ffff8880195f4250 R13: ffffea0002024220 R14: fffff94000404841 R15: ffffea0002024200 FS: 00007f223e52d700(0000) GS:ffff888063c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f67d6e60c30 CR3: 000000008d587000 CR4: 0000000000150ef0
-- Thanks and Regards,
Dipanjan // autogenerated by syzkaller (https://github.com/google/syzkaller)
#define _GNU_SOURCE
#include <endian.h> #include <errno.h> #include <fcntl.h> #include <stddef.h> #include <stdint.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <sys/ioctl.h> #include <sys/mount.h> #include <sys/stat.h> #include <sys/syscall.h> #include <sys/types.h> #include <unistd.h>
#include <linux/loop.h>
#ifndef __NR_memfd_create #define __NR_memfd_create 319 #endif
static unsigned long long procid;
struct fs_image_segment { void* data; uintptr_t size; uintptr_t offset; };
#define IMAGE_MAX_SEGMENTS 4096 #define IMAGE_MAX_SIZE (129 << 20)
static unsigned long fs_image_segment_check(unsigned long size, unsigned long nsegs, struct fs_image_segment* segs) { if (nsegs > IMAGE_MAX_SEGMENTS) nsegs = IMAGE_MAX_SEGMENTS; for (size_t i = 0; i < nsegs; i++) { if (segs[i].size > IMAGE_MAX_SIZE) segs[i].size = IMAGE_MAX_SIZE; segs[i].offset %= IMAGE_MAX_SIZE; if (segs[i].offset > IMAGE_MAX_SIZE - segs[i].size) segs[i].offset = IMAGE_MAX_SIZE - segs[i].size; if (size < segs[i].offset + segs[i].offset) size = segs[i].offset + segs[i].offset; } if (size > IMAGE_MAX_SIZE) size = IMAGE_MAX_SIZE; return size; } static int setup_loop_device(long unsigned size, long unsigned nsegs, struct fs_image_segment* segs, const char* loopname, int* memfd_p, int* loopfd_p) { int err = 0, loopfd = -1; size = fs_image_segment_check(size, nsegs, segs); int memfd = syscall(__NR_memfd_create, "syzkaller", 0); if (memfd == -1) { err = errno; goto error; } if (ftruncate(memfd, size)) { err = errno; goto error_close_memfd; } for (size_t i = 0; i < nsegs; i++) { if (pwrite(memfd, segs[i].data, segs[i].size, segs[i].offset) < 0) { } } loopfd = open(loopname, O_RDWR); if (loopfd == -1) { err = errno; goto error_close_memfd; } if (ioctl(loopfd, LOOP_SET_FD, memfd)) { if (errno != EBUSY) { err = errno; goto error_close_loop; } ioctl(loopfd, LOOP_CLR_FD, 0); usleep(1000); if (ioctl(loopfd, LOOP_SET_FD, memfd)) { err = errno; goto error_close_loop; } } *memfd_p = memfd; *loopfd_p = loopfd; return 0;
error_close_loop: close(loopfd); error_close_memfd: close(memfd); error: errno = err; return -1; }
static long syz_mount_image(volatile long fsarg, volatile long dir, volatile unsigned long size, volatile unsigned long nsegs, volatile long segments, volatile long flags, volatile long optsarg) { struct fs_image_segment* segs = (struct fs_image_segment*)segments; int res = -1, err = 0, loopfd = -1, memfd = -1, need_loop_device = !!segs; char* mount_opts = (char*)optsarg; char* target = (char*)dir; char* fs = (char*)fsarg; char* source = NULL; char loopname[64]; if (need_loop_device) { memset(loopname, 0, sizeof(loopname)); snprintf(loopname, sizeof(loopname), "/dev/loop%llu", procid); if (setup_loop_device(size, nsegs, segs, loopname, &memfd, &loopfd) == -1) return -1; source = loopname; } mkdir(target, 0777); char opts[256]; memset(opts, 0, sizeof(opts)); if (strlen(mount_opts) > (sizeof(opts) - 32)) { } strncpy(opts, mount_opts, sizeof(opts) - 32); if (strcmp(fs, "iso9660") == 0) { flags |= MS_RDONLY; } else if (strncmp(fs, "ext", 3) == 0) { if (strstr(opts, "errors=panic") || strstr(opts, "errors=remount-ro") == 0) strcat(opts, ",errors=continue"); } else if (strcmp(fs, "xfs") == 0) { strcat(opts, ",nouuid"); } res = mount(source, target, fs, flags, opts); if (res == -1) { err = errno; goto error_clear_loop; } res = open(target, O_RDONLY | O_DIRECTORY); if (res == -1) { err = errno; }
error_clear_loop: if (need_loop_device) { ioctl(loopfd, LOOP_CLR_FD, 0); close(loopfd); close(memfd); } errno = err; return res; }
int main(void) { syscall(__NR_mmap, 0x1ffff000ul, 0x1000ul, 0ul, 0x32ul, -1, 0ul); syscall(__NR_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x32ul, -1, 0ul); syscall(__NR_mmap, 0x21000000ul, 0x1000ul, 0ul, 0x32ul, -1, 0ul);
memcpy((void*)0x20000000, "ntfs\000", 5); memcpy((void*)0x20000100, "./file0\000", 8); *(uint64_t*)0x20000200 = 0x20010000; memcpy((void*)0x20010000, "\xeb\x52\x90\x4e\x54\x46\x53\x20\x20\x20\x20\x00\x04\x40\x00\x00\x00\x00\x00\x00\x00\xf8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x80\x00\x80\x00\xff\x07\x00\x00\x00\x00\x00\x00\x02\x00\x00\x00\x00\x00\x00\x00\x0f\x00\x00\x00\x00\x00\x00\x00\xf6\x00\x00\x00\xf4\x00\x00\x00\xa3\xb8\xb2\x0f\xcf\x7a\xa8\x36\x00\x00\x00\x00\x0e\x1f\xbe\x71\x7c\xac\x22\xc0\x74\x0b\x56\xb4\x0e\xbb\x07\x00\xcd\x10\x5e\xeb\xf0\x32\xe4\xcd\x16\xcd\x19\xeb\xfe\x54\x68\x69\x73\x20\x69\x73\x20\x6e\x6f\x74\x20\x61\x20\x62\x6f\x6f\x74\x61\x62\x6c\x65\x20\x64\x69\x73\x6b\x2e\x20\x50\x6c\x65\x61\x73\x65\x20\x69\x6e\x73\x65\x72\x74\x20\x61\x20\x62\x6f\x6f\x74\x61\x62\x6c\x65\x20\x66\x6c\x6f\x70\x70\x79\x20\x61\x6e\x64\x0d\x0a\x70\x72\x65\x73\x73\x20\x61\x6e\x79\x20\x6b\x65\x79\x20\x74\x6f\x20\x74\x72\x79\x20\x61\x67\x61\x69\x6e\x20\x2e\x2e\x2e\x20\x0d\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 224); *(uint64_t*)0x20000208 = 0xe0; *(uint64_t*)0x20000210 = 0; *(uint64_t*)0x20000218 = 0; *(uint64_t*)0x20000220 = 0; *(uint64_t*)0x20000228 = 0x1e0; *(uint64_t*)0x20000230 = 0; *(uint64_t*)0x20000238 = 0; *(uint64_t*)0x20000240 = 0x10000; *(uint64_t*)0x20000248 = 0x20010300; memcpy((void*)0x20010300, "\x46\x49\x4c\x45\x30\x00\x03\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x01\x00\x38\x00\x01\x00\x98\x01\x00\x00\x00\x04\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x04\x00\x00\x00\x00\x00\x00\x00\x08\x00\x00\x00\x00\x00\x00\x00\x10\x00\x00\x00\x60\x00\x00\x00\x00\x00\x18\x00\x00\x00\x00\x00\x48\x00\x00\x00\x18\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x06\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x30\x00\x00\x00\x68\x00\x00\x00\x00\x00\x18\x00\x00\x00\x02\x00\x4a\x00\x00\x00\x18\x00\x01\x00\x05\x00\x00\x00\x00\x00\x05\x00\x80\x05\x2e\x00\xc8\x8d\xd6\x01\x80\x05\x2e\x00\xc8\x8d\xd6\x01\x80\x05\x2e\x00\xc8\x8d\xd6\x01\x80\x05\x2e\x00\xc8\x8d\xd6\x01\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x00\x00\x06\x00\x00\x00\x00\x00\x00\x00\x04\x03\x24\x00\x4d\x00\x46\x00\x54\x00\x00\x00\x00\x00\x00\x00\x80\x00\x00\x00\x48\x00\x00\x00\x01\x00\x40\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x40\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x00\x00\x00\x00\x00\x18\x01\x00\x00\x00\x00\x00", 312); *(uint64_t*)0x20000250 = 0x138; *(uint64_t*)0x20000258 = 0x20000; *(uint64_t*)0x20000260 = 0x20010500; memcpy((void*)0x20010500, "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\b", 31); *(uint64_t*)0x20000268 = 0x1f; *(uint64_t*)0x20000270 = 0x201e0; *(uint64_t*)0x20000278 = 0x20010600; memcpy((void*)0x20010600, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x08\x00\x46\x49\x4c\x45\x30\x00\x03\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x01\x00\x38\x00\x01\x00\x58\x01\x00\x00\x00\x04\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x03\x00\x00\x00\x01\x00\x00\x00\x02\x00\x00\x00\x00\x00\x00\x00\x10\x00\x00\x00\x60\x00\x00\x00\x00\x00\x18\x00\x00\x00\x00\x00\x48\x00\x00\x00\x18\x00\x00\x00\x80\x05\x2e\x00\xc8\x8d\xd6\x01\x80\x05\x2e\x00\xc8\x8d\xd6\x01\x80\x05\x2e\x00\xc8\x8d\xd6\x01\x80\x05\x2e\x00\xc8\x8d\xd6\x01\x06\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x30\x00\x00\x00\x70\x00\x00\x00\x00\x00\x18\x00\x00\x00\x02\x00\x52\x00\x00\x00\x18\x00\x01\x00\x05\x00\x00\x00\x00\x00\x05\x00\x80\x05\x2e\x00\xc8\x8d\xd6\x01\x80\x05\x2e\x00\xc8\x8d\xd6\x01\x80\x05\x2e\x00\xc8\x8d\xd6\x01\x80\x05\x2e\x00\xc8\x8d\xd6\x01\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x00\x00\x06\x00\x00\x00\x00\x00\x00\x00\x08\x03\x24\x00\x4d\x00\x46\x00\x54\x00\x4d\x00\x69\x00\x72\x00\x72\x00\x00\x00\x00\x00\x00\x00\x80\x00\x00\x00\x48\x00\x00\x00\x01\x00\x40\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x40\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x00\x00\x11\x01\x0f\x00\x00\x00\x00\x00\xff\xff\xff\xff", 372); *(uint64_t*)0x20000280 = 0x174; *(uint64_t*)0x20000288 = 0x203e0; *(uint64_t*)0x20000290 = 0; *(uint64_t*)0x20000298 = 0; *(uint64_t*)0x200002a0 = 0x205e0; *(uint64_t*)0x200002a8 = 0; *(uint64_t*)0x200002b0 = 0; *(uint64_t*)0x200002b8 = 0x207e0; *(uint64_t*)0x200002c0 = 0; *(uint64_t*)0x200002c8 = 0; *(uint64_t*)0x200002d0 = 0; *(uint64_t*)0x200002d8 = 0; *(uint64_t*)0x200002e0 = 0; *(uint64_t*)0x200002e8 = 0x227e0; *(uint64_t*)0x200002f0 = 0; *(uint64_t*)0x200002f8 = 0; *(uint64_t*)0x20000300 = 0x229e0; *(uint64_t*)0x20000308 = 0; *(uint64_t*)0x20000310 = 0; *(uint64_t*)0x20000318 = 0x22be0; *(uint64_t*)0x20000320 = 0; *(uint64_t*)0x20000328 = 0; *(uint64_t*)0x20000330 = 0; *(uint64_t*)0x20000338 = 0; *(uint64_t*)0x20000340 = 0; *(uint64_t*)0x20000348 = 0; *(uint64_t*)0x20000350 = 0; *(uint64_t*)0x20000358 = 0; *(uint64_t*)0x20000360 = 0; *(uint64_t*)0x20000368 = 0; *(uint64_t*)0x20000370 = 0; *(uint64_t*)0x20000378 = 0; *(uint64_t*)0x20000380 = 0; *(uint64_t*)0x20000388 = 0; *(uint64_t*)0x20000390 = 0; *(uint64_t*)0x20000398 = 0; *(uint64_t*)0x200003a0 = 0; *(uint64_t*)0x200003a8 = 0; *(uint64_t*)0x200003b0 = 0; *(uint64_t*)0x200003b8 = 0; *(uint64_t*)0x200003c0 = 0xe0000; *(uint64_t*)0x200003c8 = 0; *(uint64_t*)0x200003d0 = 0; *(uint64_t*)0x200003d8 = 0xf01e0; *(uint64_t*)0x200003e0 = 0; *(uint64_t*)0x200003e8 = 0; *(uint64_t*)0x200003f0 = 0xf03e0; *(uint64_t*)0x200003f8 = 0; *(uint64_t*)0x20000400 = 0; *(uint64_t*)0x20000408 = 0xf05e0; *(uint64_t*)0x20000410 = 0; *(uint64_t*)0x20000418 = 0; *(uint64_t*)0x20000420 = 0xf07e0; *(uint64_t*)0x20000428 = 0; *(uint64_t*)0x20000430 = 0; *(uint64_t*)0x20000438 = 0xf09e0; *(uint64_t*)0x20000440 = 0; *(uint64_t*)0x20000448 = 0; *(uint64_t*)0x20000450 = 0xf0be0; *(uint64_t*)0x20000458 = 0; *(uint64_t*)0x20000460 = 0; *(uint64_t*)0x20000468 = 0xf0fe0; *(uint64_t*)0x20000470 = 0; *(uint64_t*)0x20000478 = 0; *(uint64_t*)0x20000480 = 0; *(uint64_t*)0x20000488 = 0; *(uint64_t*)0x20000490 = 0; *(uint64_t*)0x20000498 = 0; *(uint64_t*)0x200004a0 = 0; *(uint64_t*)0x200004a8 = 0; *(uint64_t*)0x200004b0 = 0; *(uint64_t*)0x200004b8 = 0; *(uint64_t*)0x200004c0 = 0; *(uint64_t*)0x200004c8 = 0; *(uint64_t*)0x200004d0 = 0; *(uint64_t*)0x200004d8 = 0; *(uint64_t*)0x200004e0 = 0; *(uint64_t*)0x200004e8 = 0; *(uint64_t*)0x200004f0 = 0; *(uint64_t*)0x200004f8 = 0; *(uint64_t*)0x20000500 = 0; *(uint64_t*)0x20000508 = 0; *(uint64_t*)0x20000510 = 0; *(uint64_t*)0x20000518 = 0; *(uint64_t*)0x20000520 = 0; *(uint64_t*)0x20000528 = 0; *(uint64_t*)0x20000530 = 0; *(uint64_t*)0x20000538 = 0; *(uint64_t*)0x20000540 = 0; *(uint64_t*)0x20000548 = 0; *(uint64_t*)0x20000550 = 0; *(uint64_t*)0x20000558 = 0; *(uint64_t*)0x20000560 = 0; *(uint64_t*)0x20000568 = 0; *(uint64_t*)0x20000570 = 0; *(uint8_t*)0x20086400 = 0; syz_mount_image(0x20000000, 0x20000100, 0, 0x25, 0x20000200, 0, 0x20086400); return 0; } [unhandled content-type:application/octet-stream] | |